fix spacing (#627)

Author: arthurchi93

fern/tools/handoff.mdx

@@ -214,14 +214,14 @@ destination: {
     "assistantId": "assistant-id",
     "variableExtractionPlan": {
         "schema": {
-        "type": "object",
-        "properties": {
-            "name": {
-            "type": "string",
-            "description": "Name of the customer",
-            },
-        },
-        "required": ["name"],
+          "type": "object",
+          "properties": {
+              "name": {
+              "type": "string",
+              "description": "Name of the customer",
+              },
+          },
+          "required": ["name"],
         },
     },
     "contextEngineeringPlan": {